Hoisting drum



(Noy Model.) 3 .Sheets-Sheet 1.

s. H. PITKIN.

HOISTING DRUM.

No; 580,952. Patent-ed Apr. 20, 1897.

me uname Pcrsmscm moauwo.. wAsNmmon, n. c.

(No Model.) 3 Shasta-Sheet 2.

S. H. PITKI-N. HOISTING DRUM.

No. 580,952. Patented Ap1-.20, 1897.

(No Model.)

' S. H. PITKIN.

3 Sh eats-Sheet 3.

HOISTING DRUM.

Patented Apr. 20, 1897.

Nirn STATES STEPHEN H. lPITKIN, OF AKRON, OHIO, ASSIGNOR TO THE IVEBSTER, CAMP dnLANE MACHINE COMPANY, OF SAME PLACE.

HolsTlNG-DRUM.

SPECIFICATION forming part of Letters Patent No. 580,952, dated April 20, 1897'. Application led September 12, 1896. Serial No. 605,614. (No model.)

To all whom t may concern:

Be it known that I, STEPHEN H. PITKIN, a resident of Akron, in the county of Summit and Stateof Ohio, have invented certain new and useful Improvements in Hoisting-Drums; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to animprovement in hoisting-drums, and is designed particularly for the rapid handling of ore, coal, or other material from mines by means of balanced cages or skip-cars.

The hoisting mechanism now universally used for hoisting in balance where adjustment is required for different levels comprises two large drums mounted on a shaft, each drum being of a length and diameter sufficient to receive its full length of rope and each provided with a clutch for locking it to the shaft and With a brake for locking it against movement.

The object of my invention is to provide a construction wherein onedrum serves the purpose of two drums as heretoforeused and permits of the use of a smaller drum than heretofore considered practicable and to provide a plant which will be of the same capacity and do the same work as economically as those heretofore constructed and at a considerable reduction in the first cost.

In the accompanying drawings, Figure lis a diagrammatic representation of a shaft, showing the balanced cages therein. Fig. 2 is a view in plan, partly in section, of myimproved drum and its connected parts; and Fig. 3 is a view in side elevation of same.

A represents a shaft mounted at its ends in suitable bearings and carrying the drum, composed of two sections B and C. The longer section B of the drurn is provided with two spiders or heads a, securely keyed to the shaft A or secured thereto by means of a clutch, while the shorter section C is provided with a single hub looselymounted on the shaft and with two heads or spiders b integral with the hub. The two sections of the drum are 5o provided with overlapping lips, forming a close union between the two sections, and each is also provided at its outer end with a heavy rim D, which serves as a fly-wheel to regulate the motion and secure early cut off and consequent economy of expansion of steam in engine-cylinders and as brake-rims on which brakes are used in stopping and controlling the motion of the drums. The smaller section C is also provided on its outer end with the clutcli-iange E. This flange is integral with or rigidly secured to the smaller section C of the drum, and while I have shown the iiange as embraced by the friction-band F, I -would have it understood that I do not confine myself to this form of clutch.

The friction-band is secured at its end c by strap d and suitable connections to the bracket e, rigidly secuned to the hub f, keyed to the shaft A. This band embraces the ange and is connected at its free end to the lever g, which latter is pivoted at h. This lever is connected by a toggle-link z' with the clutch-sleeve j. This sleeve j is mounted to slide on the hub f and is moved thereon by the arms 7c of the rock-shaft Z, which latter is mounted in suitable bearings and is rocked by the lever G, pitman g2, rock-shaft g3, and connections g4 between rock-shaft g3 and rocking shaft Z.

From the foregoing it will be seen that by moving the lever G in one direction the shaft lis rocked in the direction to move the clutchcollar;l inwardly, thus moving the longer endof lever g outwardly and clamping the friction-band to the iiange E, and when the parts are thus locked the two sections B and C of the drum move in unison.

Each rim of y-wheel D is also engaged by a friction-band or a brake of any approved form, and the latter are applied and released through the instrumentality of the mechanism to be now described.

II H are two shafts mounted in suitable bearings and arranged in line with their adjacent ends approximately abutting. Located between the clutchsection n, rigidly secured to the shaft H, and the clutch-section n', loosely mounted on shaft H' and embracing the meeting ends of both shafts, is the sliding clutch-section n2. This clutch section is IOO keyed to the shaft Irl', and when moved to the right engages clutch-section a and locks it to the sha-ft, and when moved to the left engages clutch-section n and locks the two shafts together. The shaft ll is connected by arms o and pitinaii o with lever o2, and hence it will be seen that when the sliding clutchsection n2 is disengaged from clutch-section a the brake actuated by the shaft ll can be applied to its ily-wheel D for locking the larger section B of the drum against movement.

The clutcli-seetioii n is provided with arms o3, which are connected by pitman otto lever o5. Ilence when the sliding section n2 of the clutch is in engagement with the section a a movement of the lever o5 actuates the brake connected to the shaft Il'. 1When, however, the section n? of the clutch is in engagement with the section n of the clutch, a movement of the lever o2 operates through the pitman o' to actuate both brakes. rlhe section nA72 of the clutch is actuated by the bell-crank lever p, pitinaii li', and lever p2.

From the foregoing it will be seen that the brakes can be applied together or independently, thus permitting either section of the drum to be held while the other section is ro tating.

The two-part drum is designed for hoisting with balanced cages where a limited adjustment-say, within two or ,three levelsis all that is desired. The rope I on the large section and the rope J on the smaller section are secured at diametrically opposite points, so that when one rope is winding the other is unwinding, thus utilizing the space vacated by one rope by winding the other thereon. rlhe shorter section C of the drum is designed to carry sufficient rope to reach from the top level bein g worked to the bottom level being worked, and I find from practice that about two hundred and fifty feet of rope is sufficient in many cases. The two ropes I and .I are of the saine length, and hence when the rope I is wound up and the rope .I unwound the former will approximately cover the larger section B of the drinn, whereas whenv the rope J is wound on the drum and the rope I unwound the former covers the smaller section C and the greater part of the larger section B. v In Fig. 1 I have given a diagramma-tic representation of a shaft, and for the purpose of illustration I have shown three working levcls. If it is desired to work from the upper level l, the adjustment of the ropes is made as follows: If necessary, he drum (as a whole) is turned to wind up on the rope I and unwind on rope .I until the cage J5 is opposite level l. If by this time the cage J6 on the rope I has not reached the surface, the section C of the drum is locked by its brake and its clutch rcleased. This holds the section against movement and permits the section B of the drum to be rotated until the cage JG has reached the surface.

It will be understood that the length of rope .I between the surface and the first working level can wind on section B of the drum, but must be completely uiiwou nd therefrom just before its cage reaches the first working level, so that when such level is reached the section l) of the drum will be free to move without interfering with rope J. After the ropes have been thus adjusted the clutch coupling section C of the drum to the shaft is again applied, thus locking the two sections together, causing them to move in unison. I'Ience by rotating the drum it will be seen that when one cage reaches the surface the other is at the proper level.

If it is desired to work from the second level, the drum would bc turned to bring cage .l5 to this level, the section C of the drum would bc locked by the brake, and the section ll rotated to bring cage J to the surface, after which the section C would be clutched to the shaft and its brake released. lVhen working from this level it is necessary, as before explained, to have the rope .I unwound from section I3 of the drum justbcfore reaching the level, so that the section l can be rotated to bring cage J iii its proper adjustment.

lVhen it is desired to hoist with one cage only, the cage carried by the rope on the seetion C can be lowered to the bottom of thc shaft or so that rope .I is clear of drum Il, its clutch released, and its brake applied, thus permitting the other cage to be worked alone.

The advantages in the use of a two-part drum such as I have described are that one drum serves the purpose of two as heretofore constructed, it permits of the use of a smaller drum than was heretofore considered practicable, and provides a plant that will be of the same capacity and do the same work as cc0- nomically as the inoie costly plants now universally used.

It is evident that numerous slight changes might be made in the general arrangement of parts herein shown and described without departing from thc spirit and scope of my invention, and hence I would have it understood that I do not limit myself to the precise details of construction shown, but consider myself at liberty to make such changes and alteiations as fairly fall within the spirit and scope of my invention.

llaving fully described myinvention,what I claim as new, and desire to secure byLctters Patent, is-

l. A hoisting device comprising a shaft, a sectional drum, one section of the drum being rigidly secured to the shaft and the other loose on the shaft but fixed against cndwise sliding movement thereon, and a clutch for locking the loose section to the shaft, substantially as set forth.

2. A hoisting device comprising a shaft, a sectional drum, one section of which is fixed on the shaft and the other loose thereon, and a clutch externally located and adapted to IOO IIO

lock or unlock the drum-section from the shaft Without the necessity of any sliding movement thereupon, substantially as set forth.

3; In a hoisting device the combination With a shaft, a two-part drum thereon, one part of the drum being securely keyed or clutched to the shaft and the other loose thereon, a clutch for locking the loose section of the drum to the shaft, a brake for each drum-section, and devices for operatin g the brakes either simultaneously' or independently.

4. In a hoisting device the combination with a shaft, a two-part drum thereon, the outer surface of the tWo drums forming a continuous unbroken Winding surface, one part of the drum being securely keyed or clutched to the shaft and the other loosely mounted to turn but not slide thereon, a brake-rim on the outer end of each section of the drum, brakes and a clutch forlocking the loose section to the shaft.

5. A hoisting device comprising a shaft, a

sectional drum, a combined brake-rim and ily-Wheel on the outer end of each section one section of the drum being securely keyed or clutched to the shaft and the other loosely mounted to turn but not slide thereon, a brake for each rim and a clutch for locking the loose section to the shaft.

6. A hoisting device comprising a shaft, a

' sectional drum, one section securely keyed or clutched to the shaft and the other loosely mounted thereon, a brake-rim on the outer end of each section of the shaft, a brake for each rim, devices for actuating the brakes independently or together, and a clutch for locking the loose section of the drum to the shaft.

7. A hoisting device comprising a shaft a sectional drum onesection keyed or clutched on the shaft and the other loosely mounted thereon, a brake-rim on the outer end of each section of the drum, a brake for each rim, devices for actuating the brakes independently or together and a clutch for locking the loose section of drum to shaft.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

STEPHEN l-I. PITKIN.

Witnesses:

J. G. Porn, W. G. PITKIN. 

